asp.net - How do I create an image of a webpage and save the image to my server using .net?

Question

I have a page that dynamically generates a small html page containing 1 small table w/text. I want to be able to take a picture (png preferable) of that page and save it to my server.

I was previously using a 3rd party solution (ABCdrawHTML2), but I have changed servers and this one does not have it. Is there a way to do it without 3rd party solutions?

Answer 1

这就是我使用 Windows.Forms WebBrowser 的方式：

public class WebSiteThumbnailImage
{
    string m_Url;
    int m_BrowserWidth, m_BrowserHeight, m_ThumbnailWidth, m_ThumbnailHeight;
    Bitmap m_Bitmap = null;

    public WebSiteThumbnailImage(string url, int browserWidth, int browserHeight, int thumbnailWidth, int thumbnailHeight)
    {
        m_Url = url;
        m_BrowserWidth = browserWidth;
        m_BrowserHeight = browserHeight;
        m_ThumbnailWidth = thumbnailWidth;
        m_ThumbnailHeight = thumbnailHeight;
    }

    public Bitmap GenerateWebSiteThumbnailImage()
    {
        Thread m_thread = new Thread(new ThreadStart(_GenerateWebSiteThumbnailImage));
        m_thread.SetApartmentState(ApartmentState.STA);
        m_thread.Start();
        m_thread.Join();
        return m_Bitmap;
    }

    private void _GenerateWebSiteThumbnailImage()
    {
        WebBrowser m_WebBrowser = new WebBrowser();
        m_WebBrowser.ScrollBarsEnabled = false;           
        m_WebBrowser.Navigate(m_Url);
        m_WebBrowser.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(WebBrowser_DocumentCompleted);

        while (m_WebBrowser.ReadyState != WebBrowserReadyState.Complete)          
            Application.DoEvents();

        m_WebBrowser.Dispose(); 
    }

    private void WebBrowser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
    {            
        WebBrowser m_WebBrowser = (WebBrowser)sender;
        m_WebBrowser.ClientSize = new Size(this.m_BrowserWidth, this.m_BrowserHeight);
        m_WebBrowser.ScrollBarsEnabled = false;
        m_Bitmap = new Bitmap(m_WebBrowser.Bounds.Width, m_WebBrowser.Bounds.Height);
        m_WebBrowser.BringToFront();
        m_WebBrowser.DrawToBitmap(m_Bitmap, m_WebBrowser.Bounds);
        m_Bitmap = (Bitmap)m_Bitmap.GetThumbnailImage(m_ThumbnailWidth, m_ThumbnailHeight, null, IntPtr.Zero);
    }
}

要使用它，请在代码隐藏的适当位置执行以下操作：

WebSiteThumbnailImage thumbnail = new WebSiteThumbnailImage(url, 1000, 1000, 200, 200);
Bitmap image = thumbnail.GenerateWebSiteThumbnailImage();
image.Save(filePath);